Maybe my case is an isolated incident, but my experiences with the 7.62 cartridge have been with Fiocchi and evey one that I have fired has split the case mouth, making the cases unusable as is for reloading.

I found that I had to trim the cases past the split to make them suitable for reloading, but, with the shortened case, the gas seal feature is lost.

And, before anyone asks, I have shot these out of several different era Nagants in my collection, including a Polish Radom, with the same results.